... of spring return pneumatic actuator1,Website:http://www.hugo-valve.com, the extruded aluminum alloy ASTM6005 body can be ... actuator's operating modeThere are two operating modes1, when ball valve closed, pistons outwards, causing the springs to compress, The ... - 1500 LB, PN10-PN646, ISO5211 DIRECT MOINTING PADFor ball valve connection size information, pls check our ball valve page of this website !